Combined Community Codec Packhttp://www.cccp-project.net/This is the Comined Community Codec Pack. Much like VLC, this is used to play those odd video formats that you find when downloading. Click here for further information regarding this player.

I Hate This Keyhttp://www.bytegems.com/ihatethiskey.shtmlDisablies the Windows key from throwing you out of a game. (Deluxe Version is available, but you have to pay for it: it's basically the same except it allows other things to be disablied too.)

Avast! Antivirushttp://www.avast.com/eng/download-avast ... ional.htmlThe best antivirus software available, comes with a free 60 day trial(Youtube Avast as there are so many keys available for it. It will give you a 2 year subscription, don't have to download anything.)

Avast! is free for home users, all you have to do is register every 14 months and they will send you a key. Registration only requires a few things, and like is said, is completely free.